use more standardized strftime formats

templates/article_stub.html

                 {%- if not articles_page or first_article_of_day %}
 
-                <h4 class="date">{{ article.date.strftime("%b %e,  %G") }}</h4>
+                <h4 class="date">{{ article.date.strftime("%b %d, %Y") }}</h4>
                 {%- endif %}
 
                 <div class="post{% if article.pinned %} pinned{% endif %}">
@@ -15,9 +15,9 @@
                     <div class="clear"></div>
                     <div class="info">
                         {% if article.pinned -%}
-                        <a href="{{ SITEURL }}/{{ article.url }}">posted {{ article.date.strftime("%B %e, %l:%M %P") }}</a>
+                        <a href="{{ SITEURL }}/{{ article.url }}">posted {{ article.date.strftime("%B %d, %I:%M %Y") }}</a>
                         {%- else -%}
-                        <a href="{{ SITEURL }}/{{ article.url }}">posted at {{ article.date.strftime("%l:%M %P") }}</a>
+                        <a href="{{ SITEURL }}/{{ article.url }}">posted at {{ article.date.strftime("%I:%M %Y") }}</a>
                         {%- if article.category.name != "Uncategorized" -%}
                         &nbsp;&middot;&nbsp;<a href="{{ SITEURL }}/{{ article.category.url }}" rel="tag">{{ article.category }}</a>
                         {%- endif %}